Item No. K9 Powder K9 Black Model K9 Powder Time of Availability 2020.12 Category Spot Type Headphone Headphone Type Headphone Type Headphone Wearing Way Headphone output sound source Universal plug diameter 3.5mm+USB plug Type In-line Type Whether wireless earphone Wired earphone Whether microphone Yes Sound principle Moving coil frequency response range 20-20000 (Hz)